Question

sec A-1 1- cos A
sec A +1 1+ cos A
plzzz answer this anyone
Hassan Rahman:
Question 16.
(i) secA−1secA+1=1−cosA1+cosA

Plzzz prove this one

Plzz​

Answer 1

given that sec a -1/ sec a +1 =1-cos a/ 1+ cos a

given that sec a -1/ sec a +1 =1-cos a/ 1+ cos a to prove LHS=RHS

given that sec a -1/ sec a +1 =1-cos a/ 1+ cos a to prove LHS=RHSnow,

given that sec a -1/ sec a +1 =1-cos a/ 1+ cos a to prove LHS=RHSnow,sec a = 1/cos a so, (1/cos a-1) / (1/cos a+ 1)

given that sec a -1/ sec a +1 =1-cos a/ 1+ cos a to prove LHS=RHSnow,sec a = 1/cos a so, (1/cos a-1) / (1/cos a+ 1)→( 1-cos al cos a) / (1+cos a /cos a)

given that sec a -1/ sec a +1 =1-cos a/ 1+ cos a to prove LHS=RHSnow,sec a = 1/cos a so, (1/cos a-1) / (1/cos a+ 1)→( 1-cos al cos a) / (1+cos a /cos a)\ 1-cos a / 1+cos a = RHS